Karampli E1,2, Souliotis K3, Polyzos N4, Kyriopoulos J1, Chatzaki E21Department of Health Economics, National School of Public Health, Athens, 2Medical School, Democritus University of Thrace, Alexandroupolis, 3Faculty of Social Sciences, University of Peloponnese, Corinth, 4Department of Social Administration, Democritus University of Thrace, Komotini, Greece